. >>> former cia director david petraeus will appear on capitol hill tomorrow. the retired general is set to testify about what he knew about the deadly attacks on the u.s. consulate in libya. his testimony comes as we are learning more about the scandal that forced him to resign. we've got the latest. >> reporter: anita and dave, days after stepping down as head of the cia, david petraeus will tell congress what he knows about the deadly attack. as the increasing sex scandal unfolds. >> reporter: the former cia director will meet with lawmakers behind closed doors on friday to talk about the attack on the u.s. consulate in libya. it is his first public appearance since resigning in disgrace over an affair with his biographer. the attorney general said that petraeus did not put the nation at risk. >> we made the determination as we were going through the matter that there was not a threat to national security. >> reporter: the fbi uncovered the affair, investigating e- mails she sent to jill kelley and the general who exceeded petraeus as the u.s. commander in a